Emerson NT5C06D user manual Fan replacement

Maintenance 43

Fan replacement

CAUTION

Before replacing the fan, turn the rectifier OFF. Completely disconnect and remove it from the shelf. Wait thirty minutes to allow all internal capacitors to fully discharge and for all components to cool down.

CAUTION

Keep any dirt, dust, moisture or metallic particles from entering into the unit.

Procedure 7 - Replacing the fan

Step	Action
1	Disconnect the 3-pin fan connector located below the fan assembly (refer
	to Figure 12).
2	With the unit sitting solidly on a clean workbench, carefully remove the
	four mounting screws that hold the fan assembly in place.
3	Slowly and carefully remove the fan assembly by pulling it from the
	chassis.
4	Replace with a new one.
5	Mount the fan assembly in the same orientation as the old one. Ensure the
	orientation of the fans is such that the air is blown outwards when the
	fans are operated.
6	Mount the fan and fan grill using the four retaining screws.
7	Reconnect the fan connector.
8	Plug the unit back in and power it up. Holding a piece of paper at the front
	of the unit should confirm that the air is pulled inwards from the front.
9	Listen carefully to detect any noise coming from the fans. They should run
	freely. Verify that the fan alarm is OFF.
	–end–

Helios Rectifier 25/48 Installation and User Manual